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research report | February 2025

research report | March 2021

Driving California's Transportation Emissions to Zero

Jean-Daniel Saphores, Esmaeil (Sina) Dabbagh, Kate Forrest, Michael Hyland, Blake Lane, Michael Mackinnon, Monica Ramirez-Ibarra, Stephen Ritchie, Andre (Yeow Chern) Tok

research report | February 2025

research report | August 2023

Improved California Truck Traffic Census Reporting and Spatial Activity Measurement

Andre (Yeow Chern) Tok, Stephen Ritchie, Yiqiao Li

research report | February 2025

research report | January 2023

Investigation of LiDAR Sensing Technology to Improve Freeway Traffic Monitoring

Stephen Ritchie, Andre (Yeow Chern) Tok, Yiqiao Li, Zhe (Jared) Sun, Koti Allu

book/book chapter | February 2025

book/book chapter | January 2023

Understanding and Modeling the Impacts of COVID-19 on Freight Trucking Activity

Yiqiao Li, Andre (Yeow Chern) Tok, Guoliang Feng, Stephen Ritchie

published journal article | February 2025

published journal article | October 2021

Deep Ensemble Neural Network Approach for Federal Highway Administration Axle-Based Vehicle Classification Using Advanced Single Inductive Loops

Yiqiao Li, Andre (Yeow Chern) Tok, Stephen Ritchie

research report | February 2025

research report | August 2021

Investigation of Truck Data Collection using LiDAR Sensing Technology along Rural Highways

Stephen Ritchie, Andre (Yeow Chern) Tok, Yiqiao Li, Zhe (Jared) Sun, Koti Allu

working paper | February 2025

working paper | August 2021

Vehicle Point Cloud Reconstruction Framework for FHWA axle-based Classification using Roadside LiDAR Sensor

Yiqiao Li, Andre (Yeow Chern) Tok, Zhe (Jared) Sun, Koti Allu

working paper | February 2025

working paper | August 2021

A Deep Ensemble Neural Network Approach for FHWA Axle-based Vehicle Classification using Advanced Single Inductive Loops

Yiqiao Li, Andre (Yeow Chern) Tok, Stephen Ritchie

working paper | February 2025

working paper | July 2020

Lidar Based Reconstruction framework for Truck Surveillance

Koti Allu, Zhe (Jared) Sun, Andre (Yeow Chern) Tok

policy brief | February 2025

policy brief | October 2019

New Tool from UC Irvine Could Save the State Millions while Providing Better Data on Truck Activity in California

Andre (Yeow Chern) Tok, Stephen Ritchie, Craig Rindt

policy brief | February 2025

policy brief | October 2019

New Tool from UC Irvine Could Save the State Millions while Providing Better Data on Truck Activity in California

Andre (Yeow Chern) Tok, Stephen Ritchie, Craig Rindt

research report | February 2025

research report | August 2017

New Methods for Monitoring Spatial Truck Travel Patterns in California Using Exisiting Dectector Infrastructure

Stephen Ritchie, Kyung (Kate) Hyun, Andre (Yeow Chern) Tok

research report | February 2025

research report | August 2017

New Methods for Monitoring Spatial Truck Travel Patterns in California Using Existing Detector Infrastructure

Andre (Yeow Chern) Tok, Kyung (Kate) Hyun, Stephen Ritchie

published journal article | February 2025

published journal article | December 2015

California Vehicle Inventory and Use Survey: Pilot Study Insights

Kyungsoo Jeong, Andre (Yeow Chern) Tok, Stephen Ritchie, Jun Park

research report | February 2025

research report | December 2015

Development of a New Methodology to Characterize Truck Body Types along California Freeways

Stephen Ritchie, Andre (Yeow Chern) Tok

working paper | February 2025

working paper | August 2014

Determinants of Air Cargo Traffic in California

Paulos Lakew, Andre (Yeow Chern) Tok

working paper | February 2025

working paper | July 2013

Integration of Weigh-in-Motion and Inductive Signature Technology for Advanced Truck Monitoring

Sarah Hernandez, Andre (Yeow Chern) Tok, Stephen Ritchie

working paper | February 2025

working paper | March 2013

Density Estimation using Inductive Loop Signature based Vehicle Re-identification and Classification

Sarah Hernandez, Andre (Yeow Chern) Tok, Stephen Ritchie

conference paper | February 2025

conference paper | September 2011

Development of a real-time on-road emissions estimation and monitoring system

Andre (Yeow Chern) Tok, Stephen Ritchie

research report | February 2025

research report | September 2010

Online Freeway Corridor Deployment of Anonymous Vehicle Tracking for Real Time Traffic Performance

Stephen Ritchie, Andre (Yeow Chern) Tok, Shin-Ting (Cindy) Jeng, Hang Liu, Sarah Hernandez, Jin Choi

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